[填空题]
“Room temperature” is often taken to beovqfu :*gwxa:63 7 tdq 68°F. What is this on the v1gry8 :f mq(*cnh;whc;l b1 pCelsius scale?mg rp(hcq; b1hw nfvy:c8;*1l $^{\circ} $ C
(b) The temperature of the filament in a lightbulb is about 1800 $^{\circ} $ C. What is this on the Fahrenheit scale? $^{\circ} $ F